The Chargers were happy to draft Johnnie Troutman in the fifth round Saturday.

Even if it meant waiting for him now.

It is almost certain the Penn State guard will miss his entire rookie season due to pre-existing medical issues. The Chargers were privy to his recent pectoral surgery and a lingering knee injury when making him the No. 149 pick in the draft.

"We wanted the player," General Manager A.J. Smith said.

Troutman suffered the pec injury about two weeks ago when bench pressing at his hometown gym. A specialist in Philadelphia performed the surgery last Thursday, and a post-operation report was sent to NFL teams, disclosing an approximate five-month recovery timetable.

Troutman has also been dealing with knee issues, which he aggravated at the Senior Bowl.

There seems to be uncertainty about which injury is more severe, but it is believed he will miss the entire season.

On Monday, the team reached a one-year contract with guard-center Rex Hadnot, who started 93 of 114 games in eight seasons, including 16 starts at right guard for the Cardinals in 2011.

His addition isn't related to Troutman's status but the inexperience of Tyronne Green, the projected starter at left guard.

"He is coming in to strengthen our backup corps," Smith said, "and he will be in the mix for the open left guard spot ... That's heavy competition right there."

Hadnot may be the first in a series of free-agent signings.

The Chargers are in the market for veteran depth, particularly at cornerback and nose tackle but also at running back.